UE editor stuck loading at 75%

Hello World!

Steps to reproduce:

  • Create empty C++ project with FPS template (Mobile, Scalable 2d/3d, With Starter content)
  • Create new plugin and configure it (, also you need to download Firebase C++ SDK and put it to FirebaseSDK folder near FirebaseSDK.Build.cs. Files structure should look like in photo)
  • Close editor, and try to open it.
  • Stuck!

I try to add Firebase support to UE4, but, even with this simple steps UE editor stuck at 73% during loading. Why is that happening?